Shift in Virulence of Soybean Cyst Nematode is Associated with Use of Resistance from PI 88788

Fig. 3. Map of Illinois showing the locations of survey sample sites in six arbitrarily-designated sections (differentiated by contiguous dots of the same color) of the state. Soil samples were collected at these locations for analysis of soybean cyst nematode populations in 2005.



Image from Plant Health Progress article:
Shift in Virulence of Soybean Cyst Nematode is Associated with Use of Resistance from PI 88788